tree c66114c04b456e2e80d95a9aa1cdac4b4e1197dd
parent 63e8095c36e589db37a11cd13e4ab5f9b9f86f3c
author Jake Ehrlich <jakehehrlich@google.com> 1568680481 +0000
committer Copybara-Service <copybara-worker@google.com> 1616739622 -0700

[libFuzzer] Always print DSO map on Fuchsia libFuzzer launch

Fuchsia doesn't have /proc/id/maps, so it relies on the kernel logging system
to provide the DSO map to be able to symbolize in the context of ASLR. The DSO
map is logged automatically on Fuchsia when encountering a crash or writing to
the sanitizer log for the first time in a process. There are several cases
where libFuzzer doesn't encounter a crash, e.g. on timeouts, OOMs, and when
configured to print new PCs as they become covered, to name a few. Therefore,
this change always writes to the sanitizer log on startup to ensure the DSO map
is available in the log.

Author: aarongreen
Differential Revision: https://reviews.llvm.org/D66233

llvm-svn: 372056
GitOrigin-RevId: 4b23c24bc8ec84ab443df42c9fdfc74de964febb